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Sentinel flow control main process of source code analysis, I believe that many inexperienced people do not know what to do, so this paper summarizes the causes of the problem and solutions, through this article I hope you can solve this problem.

Sentinel is a lightweight flow control framework of Ali open source, which can protect the stability of services from many dimensions, such as flow control, circuit breaker degradation, system load protection and so on.

In Sentinel, Entry is used to represent a resource, and each resource has a unique Slot Chain. Different slots are responsible for different functions and are combined to achieve overall flow control. The main workflow of Sentinel can be found in the document: https://github.com/alibaba/Sentinel/wiki/Sentinel%E5%B7%A5%E4%BD%9C%E4%B8%BB%E6%B5%81%E7%A8%8B

The core classes in Sentinel are shown below:

SphU-Sentinel static invocation entry

CtSph-actual invocation entry

Context-Resource context, the same resource can be contained in different context

CtEntry-represents actual resources

DefaultProcessorSlotChain-slot chain default implementation

ProcessorSlot and subclasses-different slot implementations

The calling path of the Sentinel main process is shown below:

After reading the above, have you mastered the source code analysis method of the main flow of Sentinel flow control? If you want to learn more skills or want to know more about it, you are welcome to follow the industry information channel, thank you for reading!

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